Didn't HWY just have ATR42 GIONA which was returned to AAG. I think GDRFC (ex Cimber Air machine) was delivered direct to CVT & put straight into service with AAG
Both ATR are on Highlands AOC at the moment, although I believe that is due to change.
If I remember correctly, IONA was brought in by Highland for a newspaper/mail run, however the contract ended and they had no further use for it. It then spent some time sat at Coventry before being pressed into service by Atlantic Air Transport for ad-hoc freight and passenger flights.
I suspect the ATR has been Atlantique's saving grace going on the lack of DC6 action this year.